AP BIOLOGY

Detailed explanation-1: -One copy of the human genome consists of approximately 3 billion base pairs of DNA, which are distributed across 23 chromosomes. Human chromosomes range in size from about 50 million to 300 million base pairs.

Detailed explanation-2: -A human genome has around 3 billion base pairs. Your body is made up of trillions of cells. Each of these cells has two copies of your genome. That’s the reason you sometimes see the 6 billion number.

Detailed explanation-3: -3.2 billion That’s how many base pairs-or sets of genetic “letters"-make up the human genome. In order to list all those letters, a person would have to type 60 words per minute, 8 hours a day, for about 50 years!

Detailed explanation-4: -Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people.

Detailed explanation-5: -The human genome In fact, we know the sequence of the entire human genome-all 3 billion letters. That’s enough information to fill roughly 1, 000 200-page books! Contained within the 3 billion letters of the human genome are about 21, 000 genes. Most of our known genes code for proteins, but some code for RNA molecules.